Patent US3680019A successfully refreshed from Google Patents.
US3680019A
Expired / Lapsed
US
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High-voltage fuse having a plurality of fuse links wound helically around an insulating mandrel
Assignee: GOLUD INC A DE CORP
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Filing: 1970-06-08
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Granted: 1972-07-25
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Expires: 1990-06-08
Abstract
Abstract A high-voltage fuse having a mandrel supporting a plurality of ribbon fuse links wound substantially helically around the mandrel. Each fuse link has relatively short serially related neck portions, and each fuse link has a relatively long neck portion. The relatively long neck portions of the various fuse links are displaced in a direction longitudinally of the mandrel to substantially equalize heat generation by said neck portions along the mandrel.
Inventors
- 👤 Frederick J Kozacka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:37
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
An electric high-voltage fuse including a. a tubular casing of insulating material; b. a pulverulent arc-quenching filler inside said casing; c. a pair of electroconductive terminal elements closing the ends of said casing; and d. a plurality of ribbon fuse links in excess of two wound substantially helically and conductively interconnecting said pair of terminal elements, the preponderant portion of the length of each of said plurality of fuse links having relatively short serially related necks and each of said plurality of fuse links further having a relatively long neck portion and said relatively long neck portion of each of said plurality of fuse links being displaced in a direction longitudinally of said casing relative to said relatively long neck portion of all the other of said plurality of fuse links in such a way that a substantially even distribution of said relatively long neck portion of said plurality of fuse links along said casing is achieved, and said relatively long neck portion of some of said plurality of fuse links being also angularly displaced relative to said relatively long neck portion of others of said plurality of fuse links.
Claim 2
Dependent Claim
190 words
An electric high-voltage fuse including a. a tubular casing of insulating material; b. a pulverulent arc-quenching filler inside said casing; c. a pair of electroconductive terminal elements closing the ends of said casing; and d. a plurality of ribbon fuse links in excess of two wound substantially helically and conductively interconnecting said pair of terminal elements, the preponderant portion of the length of each of said plurality of fuse links having relatively short serially related necks and each of said plurality of fuse links further having a relatively long neck portion and said relatively long neck portion of each of said plurality of fuse links being displaced in a direction longitudinally of said casing relative to said relatively long neck portion of all the other of said plurality of fuse links in such a way that a substantially even distribution of said relatively long neck portion of said plurality of fuse links along said casing is achieved, and said relatively long neck portion of some of said plurality of fuse links being also angularly displaced relative to said relatively long neck portion of others of said plurality of fuse links.
Claim 3
Dependent Claim
71 words
An electric high-voltage fuse as specified in claim 1 including a casing of glass-cloth-melamine, at least three substantially helically wound fuse links with said relatively long neck portion thereof arranged at at least three points spaced in a direction longitudinally of said casing, each of said relatively long neck portions being formed by a plurality of parallel-connected current paths each provided with a link-severing overlay of a low fusing point metal.
Claim 4
Dependent Claim
103 words
A high-voltage fuse as specified in claim 2 wherein a. said pair of terminal elements is formed by a pair of terminal plugs press-fitted into the ends of said casing and having radially extending grooves in the axially inner end surfaces thereof; and wherein b. said fuse links are supported by a fuse-supporting mandrel structure, said fuse-link-supporting mandrel structure being formed by a plurality of elongated separate plates of insulating material engaging with the axially outer edge portions thereof said grooves in the axially inner end surfaces of said pair of terminal plugs and having radially outer edges engaged by said fuse links.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |